How Hashtags Work on Twitter, Instagram, Google Plus, Pinterest, Facebook, Tumblr, and Flickr by Ann Smarty

A hashtag is the wonder of the past decade. It was born to address the need to organize and make sense of the overwhelming social media buzz. Thanks to active and creative user adoption, hashtag support has been added to most popular social media platforms. This article shows how different social media sites make use of hashtags. Most importantly, it shares some insight into how you can make the most effective use of hashtags for your brand.